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Use of tag of JSTL
In this section we will learn how to use tag of Xml tag library of Jstl. This tag is used to perform conditional operations marked by and tags.

Use of <x:choose> tag of JSTL

In this section we will learn how to use <x:choose> tag of Xml tag library of Jstl. This tag is used to perform conditional operations marked by <when> and <otherwise> tags.

<x:when> is used to match given condition in 'select' attribute. If found true execute the statement given in this tag.
<x:otherwise> If found condition false given <x:when> tag, execute tag <x:otherwise>.

Standard Syntax : <%@ taglib prefix="x" uri="http://java.sun.com/jsp/jstl/xml" %>

Attributes of <x:when> Tag
select	Defines xPath expression.

choose_xmlJstlTag.jsp

<%@ taglib prefix="x" uri="http://java.sun.com/jsp/jstl/xml" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<html>
    <head>
        <title>Example x:if tag of JSTL</title>
    </head>
    <body>        
        <c:import var="import" url="employee.xml" />
        <x:parse var="doc" doc="${import}" />
        <table border="1">
            <tr>
            <th>Employee Name</th>
            <th>Promotion </th>
            <x:forEach var="emp" select="$doc/org/company/emp" >
                <tr>
                    <td><x:out select="$emp/name" /> </td>
                    <td>
                        <x:choose>                       
                            <x:when select="$emp/age>23">
                                One month<br>            
                            </x:when>

                            <x:otherwise>                
                                Not eligible<br>         
                            </x:otherwise>               
                        </x:choose>                                 
                    </td>
                </tr>
            </x:forEach>
        </table>
    </body>
</html>

Output :

Download Source Code

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Related Tags: c xml library file files stl orm ant form io user sed jstl tag parameter transform this js for add

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